package com.kafka.consumer;

import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Scanner;

/**
 * FinalShell激活，与kafka无关
 * @author  yh
 * @date  2022/5/11
 */
public class FinalShell {
        public static void main(String[] args) throws NoSuchAlgorithmException, IOException {
            System.out.print("随便输入用户名，密码点击离线激活。输入FinalShell的离线机器码：");
            Scanner reader = new Scanner(System.in);
            String machineCode = reader.nextLine();
            generateKey(machineCode);
        }

        public static void generateKey(String hardwareId) throws NoSuchAlgorithmException {
            String proKey = transform(61305 + hardwareId + 8552);
            String pfKey = transform(2356 + hardwareId + 13593);
            System.out.println("请将此行复制到离线激活中："+proKey);
            System.out.println(pfKey);
        }

        public static String transform(String str) throws NoSuchAlgorithmException {

            String md5 = hashMD5(str);

            return hashMD5(str).substring(8, 24);
        }

        public static String hashMD5(String str) throws NoSuchAlgorithmException {
            MessageDigest digest = MessageDigest.getInstance("MD5");
            byte[] hashed = digest.digest(str.getBytes());
            StringBuilder sb = new StringBuilder();
            for (byte b : hashed) {
                int len = b & 0xFF;
                if (len < 16) {
                    sb.append("0");
                }
                sb.append(Integer.toHexString(len));
            }
            return sb.toString();
        }
    }